Ore-screen.



RFRANZ. ORE SCREEN. APLIUATION FILED JUNE 8,1908.

9673008, Patented Aug. 9, 1910.

P. FRANZ.

03B SCREEN. APPLICATION FILED JUNE 8, 190B.

Patented Aug. 9, 1910.

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unirsi) sfrkfrns PATENT Nomnes.

FRANK FRANZ, or BURKE, IDAHO.

ORE-SCREEN.

T o all whom it may concern:

Be it known that I, FRANK FRANZ, a cit-izen of the United States,residinof at Burke, in the county of Shoshone and Idaho, have invented anew and useful Improvement in OreScreens, of which the fol lowing is aspeciiication.

This invention relates to a conveyer and separator for ores.

The object of the invention is to convey ores which have been previouslyacted upon to a certain extent from a suitable temporary source ofsupply to a suitable place of storage, and during said conveyance toscreen from the ore being conveyed the finer particles which in turn areconveyed "to a second place of storage, so that the device can beemployed either asa screening or separating device or as a gradingdevice.

It will be understood of course that the exact use made of the inventionwill depend upon the nature of the ores fed to it, and to the conditionof said ores when fed, as the same device can be employed for separatingdust, waste, etc., from ores ofcertain grades and for grading other oresor if desired minerals, according to size.

rIhe invention consists in the novel features of constructionhereinafter set fort-h, pointed out in the claims and shown in theaccompanying drawings, in which- Figure 1 is a plan View of the device.Fig. 2 is a section on the line 2--2 of Fig. 1. Fig. 3 is a section onthe line 3 3 of Fig. 2. Fig. 4 is an end elevation of a frame support, abelt and an angled plate being shown in section. Fig. 5 is an enlargeddetail sec tional view taken adjacent to and parallel to the line 2-2 ofFig. 1, and showing in transverse section one screen and portions of twoadjacent screens.

In these drawings 1 represents a suitable supporting frame which may beof any size and construction and 2 represents a hopper from which leadsa discharge chute 3 and in operation the ores are delivered'to thehopper 2 and fed by gravity from said hopper to my device. I employ withmy invention two parallel shafts 4 journaled transversely upon the frame1 and upon one of which is placed a band wheel 5. IVithm the frame andupon these shafts I mount flanged pulleys 6. Over these pulleys runbelts 7 arranged parallel to each other and travel ing adjacent toopposite sides of the frame Specification of Letters Patent.

Application led June 8, 1908.

State of Patented Aug. 9, 1910.

Sera1 No. 437,451.

1, chainsand sprockets have been found unsuitable for use in machines ofthis kind as the links till with sand and other foreign matter. Thesebelts carry between them suitable screens 8, the belts and screensforming an endless conveyer which receives the material fed from thehopperQJ, and the material ne enough to pass through the screens isdeposited. into a transversely arranged chute 9 having a discharge mouth10, which mouth may either discharge the fine material upon one side ofthe frame 1 or it may discharge it into cars, wagons or upon an inclinedown which it may travel. The material which does not pass through thescreens is dumped as the screens pass downwardly and over the rearpulleys, into a large hopper 11, from which the material is dischargedinto a suitable receptacle.

The above brief description of the device will make clear its generalconstruction, but in order to reduce the device to a practical basis, itis necessary to provide some special means whereby the screens` 8 willpass readily over the pulleys, breaking a oint as they pass from upperto lower position, and uniting again to form a practical continuousconveyer as they pass beneath the feed chute 3. In order to provide forthe easy passage of the screens around the two sets of pulleys, the belt7 instead of being permitted to assume the shape which a flexible beltwill take when run over two pulleys is given a succession of compoundcurves similar to the curvature of the pulleys, and is held in suchshape by securing each belt to a series of curved angled plates 1Q, thesaid plates being riveted to the belts, as shown most clearly in Fig. 4,said plates being spaced apart, thus causing each belt to assume aserpentine shape. This provides each belt with a plurality of curvedvertically arranged metal flanges to which are bolted end boards 13,said end boards being cut away as shown at 12a to permit them tointerlock when the belt is running in a horizontal plane, and to enablethem to break joint as the belts pass over the pulleys. It will beunderstood that each belt carries as many of the curved angled plates 12and as many end boards 13 as there are screens in the conveyer. Wherethe material to be passed through the screens is large and coarse, thescreens themselves may be formed of metal sheets secured directly to theend boards 13, said plates havingv openings punched therein throughwhich the screened material passes. In the accompanying drawings,however, I have shown a series of screens intended for the linerv gradesof ores and the screens are, there"-vr fore, formed offwire of anysuitableY mesh.' lVhere screens of this kind are employed, and this willbe the usual construction, flanged frames 14 are secured to the endYboards 13 and frames 15 upon which the wire screens v8 are securedaretted within the frames 14, resting upon the flanges, as shown moreespecially in Fig. 5, and whenever' a screen becomes broken or damagedin any way the frame 15 can be lifted out and anew screen substitutedfor theold one.` It willalso be noted thattheframes 15 areV angled-alongone side atl their top, thusv producing anoutwardly extending flange 16vwhich when the end boards'l?) are interlocked, lap over the top oftheframe 14 of the adjacent screen, which construction is also most clearlyshown in the enlarged sectional vview in Fig. 5. By'having each frame 15overlap an adjacent frame, none ofthe material lfed from the chute tothe screens is permitted to drop in between the frames. In using theconveyer aboveA described, I intendl to discharge the materialuponfthescreens with a discharge ofwater in order. to prevent clogging of thescreens and to aid in rapidlysc'reening the ores. Y For this purpose, Iprovide a water supply pipe-r 17 'p'rovided with two horizontallyextending branches 18 and' 19, suitably perforated to discharge waterupon the screens, the pipe 18 discharging water upon the screens abovethe chute 9, and the pipe 19 passing below thev chute 9 and aboveI thehopperl 11.y By means of these pipes the` screens are'kepty clean andthe work ofA screening or separating the material greatly hastened.

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent, is :-l

1. A device of the kind described comprising a plurality of pulleys,parallel belts travelingover saidA pulleys, curved angled plates securedto the belts, the plates being spaced apart, interlocking boards securedto said plates, the boards being of greater length than the chord of theplates, and screens carried between the said boards, the boards formingends of a screen frame.

2. A device of the kind described comprising a plurality'of pulleys,belts running over said pulleys, curved angled plates secured to thebelts, said plates giving the beltsa permanent serpentine form,interlocking screen frames carried by the plates and between the belts,a feed chute for discharging material to said screens, a discharge chutearranged beneath the screens and receiving material passing throughthem, a hopper in which said screens dump.

3. A device'of the kind described comprising two sets of' pulleys,endless belts running over said pulleys, curved angled plates secured tosaid belts and holding them in a serpentine form, interlocking endboards carried by said plates, flanged frames carried by said endboards, screens carried by said frames, means for feeding material tosaid screens, and a discharge chute receiving material passing throughthe screens the arcs being similar to the curvature of the pulleys.

FRANK FRANZ.

vWitnesses GEORGE F. CHARLESTON, GARY C. BURKE.

